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Glint is configured by adding a "glint" key to your project's tsconfig.json or jsconfig.json file.
"compilerOptions": { /* ... */ },
"include": [ /* ... */ ],
"glint": {
"environment": "ember-loose"
The general shape of the value of the "glint" key looks like this:
interface GlintConfigInput {
environment: string | Array<string> | Record<string, unknown>;
checkStandaloneTemplates?: boolean;
Each key is summarized in further detail below.


The environment key specifies what Glint environment(s) your project is operating in. For instance, in loose-mode Ember.js project where you have @glint/environment-ember-loose installed, you could specify "environment": "ember-loose". You may also specify an array if your project operates in multiple environments.
Some environments may accept user-specified configuration. To pass configuration into one or more environments, you can use an object literal mapping environment names to their config:
"glint" {
"environment": {
"ember-loose": {},
"glimmerx": {
"additionalGlobals": ["my-special-template-macro"]


In environments like ember-loose that support templates in separate files from their backing class, Glint normally determines whether to typecheck a template based on whether its backing class is in a .ts or .js file. However, for a template-only component, there's no backing module to check.
This flag defaults to true, and setting it to false means Glint will never produce type errors for templates that don't have a corresponding .js or .ts file.